Steam-generator.



No. 797,329. PATENTED AUG. 15, 1905. G. B. SGHEFLR ER.

STEAM GENERATOR.

APP-LI'BATION FILED AUG. mo. 19%.

CHARLES E. SCHERRER, 0F BELLEVUE, KENTUCKY.

S'ttEtiWl mtituEFttt'l'UFt.

no. ve /e29.

fipeeification of Letters Patent.

Patented Aug. 15, 1905.

Application filed August 20, 1904. Serial No. 221,499.

To all whom 'rrtrty concern.-

Be it known that l, CI-IAnLies B. Sonnnnnn, a citizen of the UnitedStates of America, and a resident of ldellevue, in the county ofLlampbell and tEtate of Kentucky, have invented certain new and usefulImprovements in citeam- Generators, of which the following is aspeciiication.

This invention relates to certain improve ments in steam-generators, andparticularly in that class of boilers which are designed for quickoperation in generating steamas, for example, boilers for lire-engines,automobiles, and the like; and the object of the invention is to providea generator of this general character and of a simple and inexpensivenature which shall be compact and strong in construction and especiallyadapted to atlord a maximum of etliciency for the generation of steamwith comparatively small bulk and light weight, whereby the device isespecially adapted for use by reason of the convenience with which itmay be transported.

The invention consists in certain novel features of the construction,combination, and arrangement of the several parts of the improvedgenerator whereby certain important advantages are attained and thedevice is made simpler, cheaper, and otherwise better adapted and moreconvenient for use, all as will be hereinafter fully set forth.

The novel features of the invention will be carefully defined in theclaims.

in the accon'ipanying drawings, which serve to illustrate my invention,Figure 1 is a sectional view taken vertically and axially through thegenerator embodying my improvements, and Fig. 2 is a transverse sectiontaken through the device in the plane indicated by line ft (0 in Fig. 1.Fig. 3 is a sectional view drawn to an enlarged scale and showing,detached and in longitudinal midsection, one of the water tubes or plugswith which the improved generator is provided. Fig. t is a sectionalview taken transversely through the water tube or plug and showing thepartition extended in the same to tacili: tate the circulation of watertherethrough.

In the views, 1. indicates a metallic shell which forms the upper bodyportion of the improved generator and is provided at itsupper part witha central steam. exit or supply pipe 2 and has its lower part or baseclosed by a sheet 3 of inverted conical form, the up per larger portionof which is provided with an integral cylindric flange 4C, lappedoutside of the lower edge of the body portion 1 and held thereto byrivets or otherwise to produce a tight joint between the parts. Thebasesheet 3 has at its lower smaller portion a nipple 5, alined with theaxis of the generator and from which is extended downwardly awater-supply pipe 6, the lower extremity of which has connection with ablow-oft cock 7 and has also connection above said cock 7 by way otacoupling 8 with horizontally extended and alined pipes 9 and 10, thepipe 10 having connection with a feed-water-supply pipe 11, so that thegenerator is fed therefrom through the pipes 10 and 6.

'Within the lower portion of the generatorshell, which is termed of thebody portion 1 and base-sheet 3, is extended a battle-plate or sheet 12,the upper edge portion of which is held beneath the lower edge oi? thebody portion 1 below the lap of the members of which the shell isformed, said upper portion being also provided with a series of ports 14concentrically arranged within the wall of the shell and of circularform, as shown in the crosssection, Fig. 2, of the drawings. Thebattleplate 12 is also of inverted conical form; but its sides have lesspitch or taper than the sides of the base-sheet 3, and saidbai'lie-plate is supported within the shell of the generator at anelevation above the base-sheet 3, where by a space or chamber 16 isproduced between the baliic-plate and base-sheet, which chamber is ofcontracted thickness and is thicker or deeper at its lower part than atits upper portion by reason of the (litter-once in pitch or taperbetween the sides of the conical baffle-plate and base-sheet, betweenwhich the chamber is produced. The battle-plate has a central port oropening 15 at its lower part alined with the inlet-pipe 6, by which thegenerator is supplied with teed-water from the pipe 8, and said port 15permits a circulation of water from within the generatorshell above thebattlelate 12 to the space or chamber 16 below said battle-plate, asindicated by the arrow in Fig. .1.

Upon the base-sheet 3 of the improved generator li provide a plurality01'' water pipes or plugs 17, which may be concentrically arranged andwhich are extended, as shown on the drawings, at right angles from theconical inclined surface of the base-sheet :t'or ditferent distances, sothat the extremities of said tubes or plugs 17 are alined with eachother in a circular plane concentric with the shell of the generator andalso in a horizontal plane parallel with the water-level indicated at wwithin the generator. The tubes or plugs 17 are closed at their outerends, as clearly shown in Figs. 1 and 3 and in order that the flames andhot gases from the burner or heater may circulate freely between saidtubes to heat the water therein contained the tubes are spaced apart toprovide openings or channels between them. The conical formation of thebase-sheet and the angular arrangement of the plugs 17 insures a maximumheating eflect, since the flames and hot gases are thereby caused tocirculate in contact with the surfaces of said base-sheet and plugs 17and are prevented from being deflected, so that the heating effect isconcentrated and dissipation of the heat is avoided. Any desired kind ortype of burner or heater may be employed in connection with the improvedgeneratoras, for example, a petroleum-burner, as indicated in dottedlines at 19, in Fig. 1. Each tube or plug 17 has its upper or inner endset in the base-sheet 3 in any desired way, so that water from the space16 is admitted at said end of the tube and is permitted to circulatethrough the same to absorb heat imparted to the tubes by the circulationof the flames and hot gases between them, and in order to facilitate thecirculation of Water through said tubes17 I preferably provide each tubeor plug, as shown on the drawings, with a central diaphragm or partition18, formed of a metal sheet or strip centrally and longitudinallyextended Within the tube so as to provide upon its opposite sidespassages, one of which is adapted for the inflow of water from thechamber 16 to the closed extremity of the tube and the other of which isadapted for the outflow of water from the tube to said chamber 16, asindicated by the arrows in Fig. 1, the outer end of each metal plate orstrip 18 being formed with a notched or concaved edge surface, so thatwhen the strip or plate is inserted within the tube an opening 18will beafforded at the end of the tube for communication between the passagesat opposite sides of the strip or plate 18.

20 and 21 indicate pipe-coils extended concentrically outside of theshell of the generator and outside of the circular plane in which theends of the tubes or plugs 17 are arranged, and these coils have theirturns closely adjacent, so as to receive as much of the heat as possiblefrom the flames or heated gases from the heater or burner below thegenerator. The coil 20 is above the coil 21 and surrounds thesteam-space within the generator above the Water-level {0, While thelower coil 21 surrounds the water-space of the generator. Said upper andlower coils are connected by T connections or couplings 22, which arecoupled with opposite sides of the body portion 1 of thegenerator inline with the water-level 50 therein.

As shown on the drawings, each of the coils 20 and 21 is, in fact, adouble coil, being formed of two spirally-bent pipes the turns orspirals of which alternate with each other, and the upper end of each'ofthe pipes of which the upper coil 20 is formed has connection, as shownat 23, with the steam-space at the top of the generator. w

One of the pipes of which the lower coil 21 is formed has connection, asshown at 24, with a coupling 25, connected with the pipes 10 and 11, sothat feed-water from the pipe 11 is supplied to that pipe of the coil21, and the other spirally-bent pipe of which the coil 21 is formed hasconnection, as shown at 26, with the pipe 9, which, as above stated, isconnected with the coupling 8 and is adapted for the supply offeed-Water to the last-named spiral pipe comprised in the lower coil 21.Each pipe in each of the upper and lower coils 20 and 21 has also aconnection with one of the T-couplings 22 22, and by this constructionit will be seen that the feed-water supplied to the pipes of the lowercoil 21 is heated in its passage upward through said pipes and isdischarged through the T-couplings 22 into the shell of the generator atthe water-level 50 thereof, While steam generated in said lower coil andalso within the generator-shell is permitted to pass by way of theT-couplings into the upper coil 20, in which said steam circulates andis superheated and is finally discharged at the upper ends 23 of thepipes of which said upper coil is formed into the steamspace at theupper part of the generator-shell.

The water entering the chamber 16 between the base-sheet 3 andbaflie-plate 12 from the supply-pipe will be deflected by saidbaffle-plate 12 and caused to circulate through said chamber 16 andthrough the water-tubes 17, becoming gradually more and more highlyheated until it is finally discharged through the ports 14 into thewater-space above the bafl le-plate 12. There is also a downwardcirculation of water along the surface of the baflie-plate 12 andthrough the central lower opening or port 15 thereof from the waterspaceabove the baffle-plate to the chamber 16 between said baifle-plate andthe basesheet 3 of the improved generator. In this way it Will be seenthat the employment of the baflie-plate serves to produce within thelower part of the shell or casing two water spaces or chambers, oneabove and the'other below the baffle-plate, in which spaces or chambersis adapted to be contained Water at different temperatures, the coolerwater being below the baflie-plate, so that it is caused to circulatealong the heating-surfaces of the base sheet and water -tubes andbecomes teases quickly and highly heated, so that a quick generation ofsteam is rendered possible. The blow-oil cock 7 being alined with thepipe 6 and with the lower contracted portion of the conical base-shect3, at which sediment will naturally collect, is adapted for convenientemployment from time to time for blowing oii the generator to dischargesuch sediment.

The improved generator constructed as above described is of an extremelysimple and inexpensive nature and is of very c0in pact, light, andstrong construction, so that it is especially well adapted for use, andparticularly in connection with automobiles, lireengines, and the like,for which purposes the lightness and compact character of the generatorand its capacity for quick generation of steam render the deviceespecially adaptable.

It will also be obvious from the above de scription of my improvementsthat the device is capable of considerable change without materialdeparture from the principles and spirit of the invention, and for thisreason I do not wish to be understood as limiting myself to the preciseform and arrangement of the several parts of the device herein set forthin carrying out my invention in practice. For example, in some cases theemployment of the partitions or diaphragms 18 within the water tubes orplugs 17 may be dispensed with, although these partitions materiallyfacilitate the circulation of water through said tubes or plugs. Inother cases the arrangement of the coils 20 and 21 may be modified, orsaid coils may even be dispensed with altogether in certain caseswithout departure from the principles and spirit of the invention.

Having thus described my invention, what ll claim, and desire to secureby Letters Patent, is-

1. A. steam-generator comprising a shell having a base-sheet, abathe-plate extended across the interior of the shell below the water-level and adjacent to the base-sheet and provided with ports andforming in the shell two water-spaces one above and the other be low thebattle-plate, and adapted for containing water at differenttemperatures, means for supplying water to the space below thehaflie-plate and water-tubes extended from the base-sheet at angles to.the vertical and provided with partitions longitudinally and centrallyextended in them and forming in said tubes passages for the circulationof water from and to the space below the baffle-plate.

2. A steam-generator comprising a shell provided with a conicalbase-sheet and having a water-supply connection, a bathe-plate extendedacross the interior of the shell bewlOW the water-level therein andadjacent to the base-sheet and also of conical form and provided withports and forming in the shell two water-spaces one below and the otherabove the baflie-plate, water-tubes extended from the base-sheet andpartitions longitudinally and centrally extended in the watertubes andforming in each tube passages adapted for the circulation of water fromand to the chamber below the baffle-plate.

3. A steam-generator provided with a shell having a base-sheet, afire-box below said basesheet, a baffle-plate extended across the shellbelow the water-level and forming in the shell two communicatingWater-spaces below and above the balile-plate respectively, means forsupplying water to the space below the batiie-plate and a pipe-coilsurrounding the generator and the fire-box and having connection withsaid generator at the water-level and also having connection with asource of feed-water supply.

4:. A steamgenerator comprising a shell having a base-sheet, abattle-plate extended across the shell below the water-level and formedwith ports and forn'ling in the shell two water-spaces one above and theother below the baflie-plate, means for supplying water to the spacebelow the batlleplate, a pipe coil surrounding the shell at the upperpart thereof and having at its upper part communication with the upperpart of the steamspace of the shell, another pipe-coil surround ing thegenerator and having connection at its lower part with a source offeed-water sup ply and connections between the respective pipe-coils andthe shell at the water-level thereof.

Signed at Cincinnati, Ohio, this 17th day of August, 1904:.

CHARLES E. SCHERRER.

Witnesses:

E. P. KnIEeI-rorr, JOHN ELIAS Jones.

